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CVE-2026-46332

Estado: AnalizadaAlta (8)—

In the Linux kernel, the following vulnerability has been resolved:

greybus: gb-beagleplay: bound bootloader receive buffering

cc1352_bootloader_rx() appends each serdev chunk into the fixed rx_buffer before parsing bootloader packets. The helper can keep leftover bytes between callbacks and may receive multiple packets in one callback, so a single count value is not constrained by one packet length.

Check that the incoming chunk fits in the remaining receive buffer space before memcpy(). If it does not, drop the staged data and consume the bytes instead of overflowing rx_buffer.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Buffer overflow (CWE-120) en controlador Greybus que requiere interacción del usuario (UI:R) para enviar datos malformados. Permite ejecución de código arbitrario en el kernel de Linux.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or Program

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-46332",
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          "version": "3.1",
          "baseScore": 8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
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          "value": "CWE-120"
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: gb-beagleplay: bound bootloader receive buffering\n\ncc1352_bootloader_rx() appends each serdev chunk into the fixed\nrx_buffer before parsing bootloader packets. The helper can keep\nleftover bytes between callbacks and may receive multiple packets in one\ncallback, so a single count value is not constrained by one packet\nlength.\n\nCheck that the incoming chunk fits in the remaining receive buffer space\nbefore memcpy(). If it does not, drop the staged data and consume the\nbytes instead of overflowing rx_buffer."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ngreybus: gb-beagleplay: almacenamiento en búfer de recepción del cargador de arranque limitado\n\ncc1352_bootloader_rx() añade cada fragmento de serdev en el rx_buffer fijo antes de analizar los paquetes del cargador de arranque. La función auxiliar puede mantener bytes sobrantes entre retrollamadas y puede recibir múltiples paquetes en una retrollamada, por lo que un único valor de conteo no está limitado por la longitud de un paquete.\n\nComprobar que el fragmento entrante cabe en el espacio restante del búfer de recepción antes de memcpy(). Si no es así, descartar los datos preparados y consumir los bytes en lugar de desbordar el rx_buffer."
    }
  ],
  "lastModified": "2026-07-23T08:10:00.137",
  "configurations": [
    {
      "nodes": [
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